Occasional tingling in the breasts can be caused by a variety of factors, the vast majority of which refer to the stimulation of nerve endings. The causes are broadly classified as physiological or pathological.1. Physiological causes are due to the physiological period or developmental stage. This is due to the development of the breast glands, which stimulates the epidermal nerves of the breast and causes tingling. 2. Pathological tingling caused by tumors is generally caused by tumors stimulating the nerves of the breast. For example, tumors in the ducts can cause stinging pain by stimulating the ductal epithelium, or breast cancer can cause stinging pain by invading the nerve endings of the breast. 3, pathological stinging pain caused by inflammation, a small number of patients with mastitis can also cause stinging pain when inflammation stimulates the nerve endings of the breast. The treatment should be symptomatic according to the cause.